UL1574,Cl.53.4 含义
哪位高手能帮忙译下Cl.53.4 的含义？有10个金币酬谢！53.4 Test setup – Surface mounted track 53.4.1 The track lighting system assembly to be tested is to consist of three intercept connector samples, two feed connector samples, one luminaire assembly sample, and four 20 inch (0.51 m) long sections of track. The connectors and luminaire assembly samples are to be of the models with the highest measured resistance as specified in 53.2.1. The electrical fittings are to be assembled as shown in Figure 53.1 and mounted to one side of a plywood test ceiling consisting of 1/2 inch (12.7 mm) thick Grade A–C or A– D plywood of such dimensions that the plywood extends at least 1 foot (305 mm) beyond each portion of the network and luminaire assembly. A 4 inch by 1-1/2 inch deep octagonal trade size standard metal outlet box is to be secured inside a wooden box by screws through the back of the outlet box. The wooden box is to be constructed of 2 inch by 4 inch trade size pine. The inside dimensions of the wooden box are to be 4 inches by 3-7/8 inches by 1 inch (102 mm by 98.4 mm by 25.4 mm). The wooden box is to be mounted to the plywood over a 4 inch by 4 inch opening. Each section of track is to be secured to the plywood by two wood screws through openings, each of which is:a) 3 inches (76.2 mm) from the end of a track section; or b) 1/2 inch from the connector in the end of the track;whichever is the greater distance from the end. The feed connector is to be mounted to or over the outlet box. The side of the plywood to which the track system is not mounted is to be completely covered with a layer of foil-faced R19 glass fiber batt insulation with the non-foil-faced side of the insulation facing the plywood test ceiling. The plywood surface is then to be suspended or supported so that a simulated ceiling mounting of the track assembly results.Exception: If, as a result of measuring the resistance of the intercept connectors, a right or left turn intercept connector is determined to have the highest resistance and is to be subjected to the grounding resistance test, two right and one left intercept connector samples may be tested in the test assembly. 英语没过6级也没做过这类产品，根据你的信息译了一下给你参考：
53.4.1 The track lighting system assembly to be tested（作定语：译为被测试的） is to consist of（由…组成） three intercept（引申意：部分或组） connector samples，two feed（向…提供）connector samples, one luminaire assembly sample, and four 20 inch (0.51 m) long sections of track. The connectors and luminaire assembly samples are to be of the models with the highest measured resistance as specified in 53.2.1（状语，以….方式模制）. The electrical fittings（依上下文意思，其意思为制具或夹具）are to be assembled as shown in Figure 53.1 and mounted to one side of a plywood test ceiling consisting of 1/2 inch (12.7 mm) thick Grade A–C or A– D plywood of such dimensions that the plywood extends at least 1 foot (305 mm) beyond each portion of the network and luminaire assembly（这个句子太长，作一定语成分放在一句话中感觉混乱，拆开表达）. A 4 inch by 1-1/2 inch deep octagonal trade size standard metal outlet box is to be secured inside a wooden box by screws through the back of the outlet box. The wooden box is to be constructed of 2 inch by 4 inch trade size pine. The inside dimensions of the wooden box are to be 4 inches by 3-7/8 inches by 1 inch (102 mm by 98.4 mm by 25.4 mm). The wooden box is to be mounted to the plywood over a 4 inch by 4 inch opening. Each section of track is to be secured to the plywood by two wood screws through openings, each of which is:
a) 3 inches (76.2 mm) from the end of a track section; or
b) 1/2 inch from the connector in the end of the track;
whichever is the greater distance from the end. The feed connector is to be mounted to or over the outlet box. The side of the plywood to which the track system is not mounted（定语） is to be completely covered with a layer of foil-faced R19 glass fiber batt insulation with the non-foil-faced side of the insulation facing the plywood test ceiling. The plywood surface is then to be suspended or supported so that a simulated ceiling mounting of the track assembly result
用于测试的轨道照明系统组件由三部分连接构成，两个供电连接器，一个灯具安装组件以及4个20英寸（0.51米）长的轨道路段。连接器和灯具组件以53.2.1规定的高测试阻抗方式模制在一起（像插头和电源线那样模制在一起的结构）。电器制具组装如图53.1所示且安装在一个胶合板测试天花板的一面，测试天花板由1/2英寸（12.7毫米）厚A级至C级或A级至D级等尺寸的胶合板组成它的尺寸延伸至网络和灯具组件的每个部分少1英尺（305毫米）。一个4X1-1/2英寸深的约定尺寸八角形标准金属出线盒通过通过插座盒的背面用螺丝固定在一个木箱内。木箱由2X4英寸约定尺寸松树板构成。木箱内部尺寸为3X7/8X1英寸（102X98.4X25.4毫米）。木箱安装到胶合板上方并留4X4英寸的开口。轨道的每个部分由两个木螺钉固定到胶合板上并通过开口，各个开口如下：
a. 3英寸（76.2毫米）从轨道节的末端或
b. 1/2英寸，从轨道连接器或在轨道的末端。
从末端算取较大值。供电连接器连接到出线盒上或其上方。没安装轨道系统的一边胶合板完全盖上一层箔饰面R19玻纤绝缘棉絮与此同时没箔饰面绝缘棉絮（意为另一面）对着胶合板测试天花板。然后胶合板悬吊或支撑起来以便模拟轨道系统的安装方式。
这段话很难理解，而且标准本身有问题，请特别留意
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